isabellacoronel
isabellacoronel
27-07-2016
Spanish
contestada
avances cientificos en 1940
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cesaarm99
cesaarm99
02-08-2016
Penicilina se hizo un antibiótico
ciclotron para la investigación atómica entra en funcionamiento
la liofilizacion para los alimentos
primera vacuna contra la lepra
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